G824.019,G824.63 20031891投掷模式中的变化:控制速度参数的临界值=Changein throwing pattern:Critical values for controlparameter of velocity[刊.英,A]／Southard D／／Research quarterly for exercise and sport.-2002,73(4).-...G824.019,G824.63 20031891投掷模式中的变化:控制速度参数的临界值=Changein throwing pattern:Critical values for controlparameter of velocity[刊.英,A]／Southard D／／Research quarterly for exercise and sport.-2002,73(4).-396-407图8表2参15(MYL)投掷动作／／动作分析／／动力学／／控制／／速度／／参数G824.02 20031892投掷运动员身体训练水平与专项技术训练水平匹配发展的理论=Theory of matchable development ofthrowers’ physical and specifie technicaltraining level[刊,中,A]／王卫国,李志华(上海体育学院),许以诚(上海体育科研所)／／上海体育学院学报.-2003,27(1).-38-41,56参3(SJ)展开更多
Aiming at the development of parallel hybrid electric vehicle （PHEV） powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driv...Aiming at the development of parallel hybrid electric vehicle （PHEV） powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driveline gear ratio and battery parameters are determined. And then a two-level optimization problem is formulated based on analytical target cascading （ATC）. At the system level, the optimization of the whole vehicle fuel economy is carried out, while the tractive performance is defined as the constraints. The optimized parameters are cascaded to the subsystem as the optimization targets. At the subsystem level, the final drive and transmission design are optimized to make the ratios as close to the targets as possible. The optimization result shows that the fuel economy had improved significantly, while the tractive performance maintains the former level.展开更多
Let ：T2k＋1 be the set of trees on 2k＋ 1 vertices with nearly perfect matchings, and let S2k＋2 be the set of trees on 2k ＋ 2 vertices with perfect matchings. The largest Laplacian spectral radii of trees in ：T2k...Let ：T2k＋1 be the set of trees on 2k＋ 1 vertices with nearly perfect matchings, and let S2k＋2 be the set of trees on 2k ＋ 2 vertices with perfect matchings. The largest Laplacian spectral radii of trees in ：T2k＋l and S2k＋2 and the corresponding trees were given by Guo （2003）. In this paper, the authors determine the second to the sixth largest Laplacian spectral radii among all trees in T2k＋1 and give the corresponding trees.展开更多
文摘G824.019,G824.63 20031891投掷模式中的变化:控制速度参数的临界值=Changein throwing pattern:Critical values for controlparameter of velocity[刊.英,A]／Southard D／／Research quarterly for exercise and sport.-2002,73(4).-396-407图8表2参15(MYL)投掷动作／／动作分析／／动力学／／控制／／速度／／参数G824.02 20031892投掷运动员身体训练水平与专项技术训练水平匹配发展的理论=Theory of matchable development ofthrowers’ physical and specifie technicaltraining level[刊,中,A]／王卫国,李志华(上海体育学院),许以诚(上海体育科研所)／／上海体育学院学报.-2003,27(1).-38-41,56参3(SJ)
文摘Aiming at the development of parallel hybrid electric vehicle （PHEV） powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driveline gear ratio and battery parameters are determined. And then a two-level optimization problem is formulated based on analytical target cascading （ATC）. At the system level, the optimization of the whole vehicle fuel economy is carried out, while the tractive performance is defined as the constraints. The optimized parameters are cascaded to the subsystem as the optimization targets. At the subsystem level, the final drive and transmission design are optimized to make the ratios as close to the targets as possible. The optimization result shows that the fuel economy had improved significantly, while the tractive performance maintains the former level.
基金supported by the National Natural Science Foundation of China under Grant No. 10331020.
文摘Let ：T2k＋1 be the set of trees on 2k＋ 1 vertices with nearly perfect matchings, and let S2k＋2 be the set of trees on 2k ＋ 2 vertices with perfect matchings. The largest Laplacian spectral radii of trees in ：T2k＋l and S2k＋2 and the corresponding trees were given by Guo （2003）. In this paper, the authors determine the second to the sixth largest Laplacian spectral radii among all trees in T2k＋1 and give the corresponding trees.
